Why am I getting java.lang.ClassCastException ?

[phpuser123]

Here are the codes I just compiled in java and I am getting a java.lang.Class CastException ...

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutput;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.Date;

public class test_serialisation implements Serializable{

	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		FileOutputStream f;
		try {
			f = new FileOutputStream("tmp");
			ObjectOutput s = new ObjectOutputStream(f);
			s.writeObject("Today");
			s.writeObject(new Date());
			s.flush();
			FileInputStream in = new FileInputStream("tmp");
			ObjectInputStream ss = new ObjectInputStream(in);
			
			Object dt=(Object)ss.readObject();
			Date dtt=((Date) dt);
			
			System.out.println(dtt);
} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
	}

}

and my printstack is

java.lang.ClassCastException: java.lang.String
	at test_serialisation.main(test_serialisation.java:33)

I cannot understand properly what it means since I am now learning java serialisation.. I awould appreciate any help..

[improvcornartist]

The full error is

java.lang.ClassCastException: java.lang.String cannot be cast to java.util.Date
        at test_serialisation.main(test_serialisation.java:33)

and occurs on

Date dtt=((Date) dt);

It doesn't like that you are trying to convert a string to a date.